

Canadian explorers have drawn a blank in the latest hunt for the remains of Captain Sir John Franklin's fatal expedition, 160 years after he took 129 men deep into the Arctic. But will the mystery of the doomed crew ever be unravelled?
In 1845, Capt Franklin, an officer in the British Royal Navy, took two ships and 129 men towards the Northwest Territories in an attempt to map the Northwest Passage, a route that would allow sailors to travel from the Atlantic to the Pacific via the icy Arctic circle.
Stocked with provisions that could last for seven years, and outfitted with the latest technology and experienced men, the two ships - HMS Erebus and HMS Terror - were some of the biggest, strongest, vessels ever to make the journey. But the men vanished into the frozen Arctic, leaving a few clues but no explanation as to what went wrong.
The first search party set off in 1848 and searches involving teams from Canada, the UK, and the US have continued ever since. Last week, representatives from Parks Canada announced the results from their search this summer, which proved unsuccessful.
What people have been looking for has changed. We've given up looking for survivors, we've given up looking for bodies. Now we're just looking for any answers, says William Battersby, who wrote the biography of James Fitzjames, the captain of the Erebus.
The extraordinary thing is that despite all this effort, after 160 years and by thousands of people, we still don't know where the ships are, and what happened on the expedition, or what happened to most of the men.
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